EP2228784A1 - Dispositif d'affichage à cristaux liquides - Google Patents

Dispositif d'affichage à cristaux liquides Download PDF

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Publication number
EP2228784A1
EP2228784A1 EP10156070A EP10156070A EP2228784A1 EP 2228784 A1 EP2228784 A1 EP 2228784A1 EP 10156070 A EP10156070 A EP 10156070A EP 10156070 A EP10156070 A EP 10156070A EP 2228784 A1 EP2228784 A1 EP 2228784A1
Authority
EP
European Patent Office
Prior art keywords
light emitting
liquid crystal
emitting units
crystal panel
switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10156070A
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German (de)
English (en)
Inventor
Hiroshi Yamashita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Funai Electric Co Ltd
Original Assignee
Funai Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Funai Electric Co Ltd filed Critical Funai Electric Co Ltd
Publication of EP2228784A1 publication Critical patent/EP2228784A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • H05B45/48—Details of LED load circuits with an active control inside an LED matrix having LEDs organised in strings and incorporating parallel shunting devices
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/024—Scrolling of light from the illumination source over the display in combination with the scanning of the display screen

Definitions

  • the present invention relates to a liquid crystal display device.
  • a light guide plate is disposed behind a liquid crystal panel, a plurality of light emitting elements such as LEDs are provided around the light guide plate as a light source, and light emitted from the light source is used as backlight that is incident on the liquid crystal panel through the light guide plate.
  • image blur image sticking
  • the driving timing of the liquid crystal panel is adjusted to turn off the light emitting elements each time an image signal of one frame is input to the liquid crystal display device, thereby displaying a black screen.
  • This signal processing is called black insertion driving process.
  • the black insertion driving process the amount of current or voltage applied to each light emitting element is sequentially controlled to switch the light emitting elements to be turned on or off, as required.
  • Japanese Patent Publication No. 2005-302712 A discloses an LED driving circuit which includes a series-parallel circuit in which a plurality of parallel circuit blanches which are connected in series to each other and each of the parallel circuit blanches includes one or more LEDs (light emitting elements) and at least one switches which are connected in series to each other.
  • Japanese Patent Publication No. 2005-302712 A it is possible to easily prevent the variation in the display color or the brightness of light on the display screen without sequentially controlling the amount of current or voltage applied to each light emitting element.
  • Japanese Patent Publication No. 2005-302712 A does not disclose a detailed method of switching the light emitting elements to be turned on or off according to the driving timing of the liquid crystal panel in, for example, the black insertion driving process.
  • a liquid crystal display device comprising: a liquid crystal panel on which an image based on a video signal is displayed; a light guide plate disposed behind the liquid crystal panel; a plurality of light emitting units including a plurality of light emitting elements configured to emit light toward the liquid crystal panel through the light guide plate, the light emitting units arranged in series at an interval in such a direction that the light emitting elements face a side surface of the light guide plate; a feeding circuit configured to supply power to the light emitting units, the feeding circuit including: a first switch which is connected to both ends of at least one of the light emitting units, wherein the at least one of the light emitting units connected between the both ends is deactivated when the first switch is turned on; and a second switch which is connected to both ends of at least one of the light emitting units, wherein the at least one of the light emitting units connected between the both ends is deactivated when the second switch
  • the liquid crystal display device may further comprise a changing unit configured to change an order in which the switching unit switches the light emitting units to be deactivated.
  • Each of the light emitting units may include a plurality of light emitting elements arranged in series, in parallel, or in series-parallel combination.
  • a liquid crystal display device comprising: a liquid crystal panel on which an image based on a video signal is displayed; a light guide plate disposed behind the liquid crystal panel; a first light emitting unit including a plurality of light emitting elements configured to emit light toward the liquid crystal panel through the light guide plate, a second light emitting unit including a plurality of light emitting elements configured to emit light toward the liquid crystal panel through the light guide plate, wherein the first and second light emitting units arranged in series along a side surface of the light guide plate; a feeding circuit configured to supply power to the first and second light emitting units, the feeding circuit including: a first switch which is connected to both ends of the first light emitting unit, wherein the first light emitting unit is deactivated when the first switch is turned on; and a second switch which is connected to both ends of the second light emitting unit, wherein the second light emitting unit is deactivated when the second switch is turned on; a switching unit configured
  • the light emitting units including the light emitting elements are arranged in series.
  • the at least one of light emitting units is deactivated.
  • the second switch connected to both ends of at least one of the light emitting units are turned on, the at least one of light emitting units is deactivated. Therefore, it is possible to easily switch the light emitting elements to be activated or deactivated only by turning on or off the first and second switches, without sequentially controlling the amount of current or voltage applied to each of the light emitting elements.
  • the invention provides a liquid crystal display device capable of easily switching the light emitting elements to be turned on or off according to the driving timing of a liquid crystal panel.
  • the left-right direction of a light guide plate 81 shown in Fig. 2 is referred to as an X direction
  • the front-rear direction thereof is referred to as a Y direction
  • a direction orthogonal to the X and Y directions is referred to as a Z direction.
  • a liquid crystal display device 100 includes, for example, a signal input unit 1, an image processing unit 2, a timing control unit 3, a frame memory 4, a liquid crystal panel 5, a scanning line driving unit 6, a signal line driving unit 7, a backlight 8, and a control unit 12.
  • the signal input unit 1 includes, for example, an antenna that receives television broadcasting signals, a tuner, and various kinds of video terminals through which video signals are received from an external apparatus.
  • the signal input unit 1 receives the input video signal and outputs it to the image processing unit 2.
  • the image processing unit 2 includes, for example, an A/D conversion circuit, an RGB generating circuit, and an image quality adjusting circuit.
  • the image processing unit 2 generates RGB digital video signals on the basis of the video signals supplied from the signal input unit 1 and performs a scaling process corresponding to the number of pixels of the liquid crystal panel 5 to generate video signals corresponding to one frame.
  • the image processing unit 2 performs various kinds of image quality adjusting processes, such as brightness, contrast, color density, color shade, and sharpness adjusting processes, on the video signals corresponding to one frame on the basis of the image quality adjustment signals output from the control unit 12, and outputs the processed signals to the frame memory 4.
  • the timing control unit 3 generates a timing signal indicating one line period (a horizontal synchronization signal) and a timing signal indicating one frame period (a vertical synchronization signal) on the basis of the video signal supplied from the signal input unit 1 and supplies the timing signals to each unit of the liquid crystal display device 100.
  • the frame memory 4 stores each frame of video signals input from the image processing unit 2 and outputs the video signals to a liquid crystal display (not shown).
  • the liquid crystal panel 5 includes a pair of substrates separated from each other with a predetermined gap therebetween and liquid crystal that is sealed in a matrix between the pair of substrates.
  • the pair of substrates is interposed between two polarizing plates having polarization axes orthogonal to each other, and the backlight 8 is provided on the rear side of the liquid crystal panel.
  • the display region of the liquid crystal panel 5 is equally divided into a plurality of sub display regions in a matrix by a predetermined dividing method. For example, the display region is divided into nxm sub display regions.
  • the liquid crystal panel 5 is, for example, an active matrix driving type in which thin film transistors (TFTs), serving as active elements, are provided at intersections of the scanning lines X and the signal lines Y.
  • TFTs thin film transistors
  • a pixel electrode is formed in each pixel, and an opposite electrode is formed on an opposite substrate so as to be opposite to the pixel electrode.
  • alignment films are formed on the surface of the pixel electrode and the surface of the opposite electrode that are opposite to each other.
  • the TFTs are turned on or off by the timing signal generated by the timing control unit 3 such that charge is stored in the pixel electrodes, and the arrangement direction of the liquid crystal is changed. In this way, the video signal input from the signal input unit 1 is written.
  • the scanning line driving unit 6 is provided so as to correspond to each of the scanning lines X (Xl to Xp) of the liquid crystal panel 5.
  • the scanning line driving unit 6 sequentially selects the scanning lines X according to the timing signal from the timing control unit 3 and turns on or off the TFTs arranged on the same scanning line X.
  • the signal line driving unit 7 is provided so as to correspond to each of the signal lines Y (Yl to Yq) of the liquid crystal panel 5.
  • the signal line driving unit 7 applies the video signal output from the frame memory 4 or a voltage corresponding to a black image to the signal lines Y in synchronization with the scanning of each of the scanning lines X by the scanning line driving unit 6.
  • the scanning line driving unit 6 and the signal line driving unit 7 respectively drive the scanning lines X and the signal lines Y
  • the TFTs of the pixels arranged at the intersections of the scanning lines and the signal lines are turned on and charge is stored in the pixel electrodes.
  • the arrangement direction of the liquid crystal interposed between the pixel electrodes and the opposite electrode is changed, thereby transmitting or shielding light emitted from the backlight 8 that is provided on the rear side of the liquid crystal panel 5, in each pixel together with the alignment film and the polarizing film.
  • the backlight 8 is provided on the rear side of the liquid crystal panel 5 and includes, for example, the light guide plate 81 and a light source unit 82 that is provided on a left surface (in the X direction) of the light guide plate 81, as shown in Fig. 2 .
  • the backlight 8 is configured such that light emitted from the light source unit 82 in the X direction is incident on a side surface (YZ surface) of the light guide plate 81 and is reflected to the rear surface of the liquid crystal panel 5 in the Z direction by the light guide plate 81.
  • the light guide plate 81 includes a substrate that is made of, for example, an acrylic material for introducing and transmitting light, reflection dots that are formed on the rear surface (XY surface) of the substrate to reflect light passing through the substrate, a reflection sheet that covers the rear surface of the substrate, is made of a material with high light reflectance, and increases the efficiency of reflection by the reflection dots, and a diffusion sheet that covers the front surface of the substrate and diffuses light emitted from the surface of the substrate by the reflection dots.
  • a substrate that is made of, for example, an acrylic material for introducing and transmitting light
  • reflection dots that are formed on the rear surface (XY surface) of the substrate to reflect light passing through the substrate
  • a reflection sheet that covers the rear surface of the substrate is made of a material with high light reflectance, and increases the efficiency of reflection by the reflection dots
  • a diffusion sheet that covers the front surface of the substrate and diffuses light emitted from the surface of the substrate by the reflection dots.
  • the light guide plate 81 light emitted from the light source unit 82 in the X direction is introduced into the substrate through the side surface (YZ surface), and light traveling through the substrate is reflected to the front surface of the substrate in the Z direction by the reflection dots (and the reflection sheet). Then, the light is diffused by the diffusion sheet and the diffused light is incident on the rear surface of the liquid crystal panel 5.
  • the light source unit 82 includes, for example, light emitting units 83a to 83f and a feeding circuit 84 and has circuit arrangement shown in Fig. 2 .
  • Each of the light emitting units 83a to 83f includes an LED (Light-Emitting Diode) as a light emitting element that emits light to the liquid crystal panel 5 through the light guide plate 81.
  • the LEDs are arranged at a predetermined interval so as to face the side surface (YZ surface) of the light guide plate 81.
  • Each of the light emitting units 83a to 83f illuminates a region corresponding to several lines when the liquid crystal panel 5 performs an operation of writing the video signals.
  • each of the light emitting units 83a to 83f has a single LED between both ends 83aa to 83ff.
  • each of the light emitting units 83a to 83f may have a plurality of LEDs therebetween.
  • each of the light emitting units 83a to 83f may include a plurality of LEDs connected in series to each other between both ends 83aa to 83ff.
  • each of the light emitting units 83a to 83f may include a plurality of LEDs connected in parallel to each other between both ends 83aa to 83ff in the thickness direction (Z direction) of the light guide plate 81.
  • each of the light emitting units 83a to 83f may include a plurality of LEDs connected in series-parallel to each other between both ends 83aa to 83ff.
  • the feeding circuit 84 is configured to supply power to the light emitting units 83a to 83f so that the LEDs emit light.
  • the feeding circuit 84 includes, for example, switches 85a to 85g that are turned on or off in response to an operation signal from the control unit 12 and a power supply 86 that supplies a predetermined voltage to the light emitting units 83a to 83f.
  • the light emitting units 83a to 83f are connected in series to each other, and the switches 85a to 85g are connected to both ends 83aa to 83ff of each of the light emitting units 83a to 83f.
  • each of the switches 85a to 85g When each of the switches 85a to 85g is turned off, power is supplied to the light emitting units connected between both ends 83aa to 83ff by the voltage applied by the power supply 86.
  • the supply of power to the light emitting units connected between both ends 83aa to 83ff stops. That is, for example, when the switch 85a connected between both ends 83aa of the light emitting unit 83a and both ends 83bb of the light emitting unit 83b is turned on, a bypass is formed by the switch 85a even though the power supply 86 applies a voltage, and there is no potential difference between the light emitting unit 83a and the light emitting unit 83b (the supply of power stops). Therefore, it is possible to turn off the LEDs included in the light emitting unit 83a and the light emitting unit 83b.
  • the diodes represented in black in the light emitting unit 83a and the light emitting unit 83b indicate that the switches 85a is turned on and the supply of power to the light emitting unit 83a and the light emitting unit 83b stops (deactivated).
  • the diodes represented in white in the light emitting units 83c to 83f indicate that the switches 85b to 85f are tuned off and the supply of power to the light emitting units 83c to 83f is maintained (activated).
  • the control unit 12 includes, for example, a CPU (Central Processing Unit) 121, a RAM (Random Access Memory) 122 that is used as a work area of the CPU 121, and a storage unit 125 that stores various kinds of programs executed by the CPU 121.
  • a CPU Central Processing Unit
  • RAM Random Access Memory
  • the CPU 121 exectues various kinds of programs stored in the storage unit 125 according to the input signal input from each unit of the liquid crystal display device 100, and outputs an output signal to each unit on the basis of the executed programs, thereby controlling the overall operation of the liquid crystal display device 100.
  • the RAM 122 includes, for example, a program storage area for expanding process programs executed by the CPU 121 and a data storage area for storing the input data or the process results of the process programs.
  • the storage unit 125 has, for example, a switching program 125a and a changing program 125b stored in a program storage area.
  • the switching program 125a allows the CPU 121 to control the on/off states of each of the switches 85a to 85g according to the driving timing of the liquid crystal panel 5, thereby sequentially switching one or a plurality of light emitting units 83a to 83f to be turned off.
  • the driving timing of the liquid crystal panel 5 means, for example, the timing when the video signal is written on the basis of the timing signal generated by the timing control unit 3.
  • the CPU 121 executes the switching program 125a to stop the supply of power to a light emitting unit corresponding to a line on which a write operation is performed or the light emitting units adjacent thereto when the liquid crystal panel 5 writes the video signal on the basis of the timing signal generated by the timing control unit 3.
  • the CPU 121 executes the switching program 125a to sequentially turn on the switches 85a, 85b, and 85c at a predetermined time interval in synchronization with the driving of the liquid crystal arranged in the liquid crystal panel 5, thereby sequentially switching the light emitting units 83a and 83b, the light emitting units 83c and 83d, the light emitting units 83e and 83f, and the light emitting units to be turned off (LEDs to be turned off). Therefore, it is possible to obtain a so-called black insertion driving effect (it is possible to prevent image blur on the display screen).
  • the CPU 121 executes the switching program 125a to control only the on/off states of the switches 85a to 85g according to the driving timing of the liquid crystal panel 5, without controlling the amount of current or a voltage applied to each of the light emitting units 83a to 83f, thereby sequentially switching the light emitting units to be turned off (LEDs to be turned off). Therefore, a process load is significantly reduced.
  • the order in which the light emitting units 83a to 83f to be turned off are switched is changed by the execution of the changing program 125b, which will be described below.
  • the switching program 125a sequentially switches the light emitting units 83a to 83f in the changed order.
  • the changing program 125b allows the CPU 121 to change the order in which the light emitting units to be turned off are switched by the execution of the switching program 125a.
  • the CPU 121 executes the changing program 125b to change the order in which the switches are turned on such that the switch 85d, the switch 85e, the switch 85f, and the switch 85g (the switch 85f and the switch 85g are turned on at the same time) are turned on in this order at the next driving timing of the liquid crystal panel 5 (that is, at the timing when the image signals of the next frame are displayed).
  • the light emitting units 83b and 83c, the light emitting units 83d and 83e, the light emitting units 83f and 83a are tuned off (deactivated) in this order.
  • the order of the lines to which the write operation is performed is also changed according to the order in which the light emitting units are switched.
  • the order in which the light emitting units are switched is changed according to the driving timing. In this way, it is possible to prevent the user from perceiving the varaition in brightness.
  • the switching program 125a and the changing program 125b are not limited to the above-mentioned configuration in which they allow the CPU to stop the supply of power to a plurality of light emitting units through one switch.
  • switches 87a to switch 87f may be connected to both ends 83aa to 83ff of each of the light emitting units 83a to 83f and the supply of power to the light emitting units 83a to 83f may be individually swiched by the switches 87a to 87f.
  • the CPU 121 executes the switching program 125a to sequentially turn on the switches 87a and 87b, the switches 87c and 87d, and the switches 87e and 87f at a predetermined time interval according to the driving timing of the liquid crystal panel 5, thereby sequentially switching the light emitting units 83a and 83b, the light emitting units 83c and 83d, the light emitting units 83e and 83f (switching the light emitting units to be turned off (deactivated)).
  • the CPU 121 executes the changing program 125b to change the order in which the switches are turned on such that the switches 87b and 87c, the switches 87d and 87e, and the switches 87f and 87a are turned on in this order at the next driving timing of the changing liquid crystal panel 5.
  • the changing program 125b to change the order in which the switches are turned on such that the switches 87b and 87c, the switches 87d and 87e, and the switches 87f and 87a are turned on in this order at the next driving timing of the changing liquid crystal panel 5.
  • an external apparatus inputs a video signal to the signal input unit 1 of the liquid crystal display device 100 (Step S1).
  • the timing control unit 3 generates a timing signal on the basis of the video signal and supplies the timing signal to each unit of the liquid crystal display device 100, and the liquid crystal panel 5 is driven in response to the timing signal (Step S2).
  • the CPU 121 executes the switching program 125a to sequentially switch the light emitting units 83a to 83f to be turned off according to the driving timing of the liquid crystal panel 5 (Step S3).
  • Step S4 the CPU 121 determines whether to display all images on the basis of the video signal input in Step S 1 (Step S4).
  • Step S4 If it is determined that all images are not displayed (Step S4; No), the CPU 121 executes the changing program 125b, changes the order in which the light emitting units to be turned off are switched by the execution of the switching program 125a (Step S5), and repeatedly performs the process after Step S2.
  • Step S4 if it is determined that all images are displayed (Step S4; Yes), the CPU 121 ends the process.
  • the light emitting units 83a to 83f include LEDs that are provided at a predetermined interval so as to face the side surface of the light guide plate 81.
  • the light emitting units 83a to 83f are connected in series to each other, and the feeding circuit 84 includes the switches 85a to 85g (87a to 87f) that are connected to both ends 83aa to 83ff of each of the light emitting units 83a to 83f and/or both ends 83aa to 83ff of a plurality of light emitting units 83a to 83f.
  • each of the switches 85a to 85g are controlled by the switching program 125a according to the driving timing of the liquid crystal panel 5 such that one or a plurality of light emitting units 83a to 83f to be turned off are sequentially switched.
  • the CPU 121 executes the switching program 125a to control only the on/off states of the switches 85a to 85g according to the driving timing of the liquid crystal panel 5, without controlling the amount of current or a voltage applied to each of the light emitting units 83a to 83f, thereby sequentially switching the light emitting units to be turned off (LEDs to be turned off).
  • the CPU 121 executes the changing program 125b to change the order in which the light emitting units to be turned off are switched by the execution of the switching program 125a.
  • the CPU 121 executes the changing program 125b to change the order in which the light emitting units 83a to 83f are switched according to the driving timing of the liquid crystal panel 5. In this way, the user does not perceive the varaition in brightness.
  • the light emitting units 83a to 83f include a plurality of LEDs connected in series, in parallel, or in series-parallel to each other.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Liquid Crystal (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
EP10156070A 2009-03-11 2010-03-10 Dispositif d'affichage à cristaux liquides Withdrawn EP2228784A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009057364A JP2010210973A (ja) 2009-03-11 2009-03-11 液晶表示装置

Publications (1)

Publication Number Publication Date
EP2228784A1 true EP2228784A1 (fr) 2010-09-15

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Application Number Title Priority Date Filing Date
EP10156070A Withdrawn EP2228784A1 (fr) 2009-03-11 2010-03-10 Dispositif d'affichage à cristaux liquides

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US (1) US8552970B2 (fr)
EP (1) EP2228784A1 (fr)
JP (1) JP2010210973A (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101689819B1 (ko) * 2010-11-01 2016-12-26 삼성전자주식회사 디스플레이 장치 및 그 화질 개선 방법
CN108366465B (zh) * 2018-04-24 2024-07-12 华域视觉科技(上海)有限公司 一种光源控制电路与照明装置

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EP1898676A1 (fr) 2006-09-06 2008-03-12 THOMSON Licensing Appareil d'affichage
WO2009013675A1 (fr) 2007-07-23 2009-01-29 Nxp B.V. Configuration d'interrupteur de dérivation à led auto-alimentée

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Publication number Priority date Publication date Assignee Title
US20060226800A1 (en) 2002-12-18 2006-10-12 Koninklijke Philips Electronics N.V. Scrolling backlight device for lcd display panel
JP2005302712A (ja) 2004-03-19 2005-10-27 Citizen Watch Co Ltd Ｌｅｄ駆動回路およびそれを用いた液晶装置
US20060232544A1 (en) 2005-04-18 2006-10-19 Renesas Technology Corporation Liquid crystal display device
EP1898676A1 (fr) 2006-09-06 2008-03-12 THOMSON Licensing Appareil d'affichage
WO2009013675A1 (fr) 2007-07-23 2009-01-29 Nxp B.V. Configuration d'interrupteur de dérivation à led auto-alimentée

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US8552970B2 (en) 2013-10-08
US20100231578A1 (en) 2010-09-16
JP2010210973A (ja) 2010-09-24

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